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Fuel cell stack

a technology of fuel cell and stack, applied in the direction of fuel cell, reactant parameter control, electrical apparatus, etc., can solve the gap between the resin layer and the end pla

Active Publication Date: 2019-10-08
TOYOTA JIDOSHA KK +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a fuel cell system or vehicle that includes a fuel cell stack. The disclosure can be implemented in various ways, such as using a different aspect of the system. The technical effect is that the patent provides a more comprehensive solution for utilizing fuel cells in a practical and efficient manner.

Problems solved by technology

A difference in coefficient of thermal expansion between the end plate and the resin layer formed to cover the inner circumferential walls of the through holes formed in the end plate and the like may cause a gap between the resin layer and the end plate in the course of repeated operations of the fuel cell stack.

Method used

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Experimental program
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first embodiment

A. First Embodiment

[0013]A1. Configuration of Fuel Cell Stack

[0014]FIG. 1 is a sectional view illustrating the schematic configuration of a fuel cell stack 100 according to one embodiment of the disclosure. A cross section along a stacking direction of the fuel cell stack 100 is illustrated in FIG. 1. In FIG. 1, a Z axis is set parallel to a vertical direction, and an X axis and a Y axis are set parallel to a horizontal direction. A +Z direction corresponds to a vertically upward direction, and a −Z direction corresponds to a vertically downward direction. The stacking direction is parallel to the X axis.

[0015]The fuel cell stack 100 is configured to include a stacked body 20, a first end plate 30, a second end plate 31, a case 40 and a plurality of bolts 50. The stacked body 20 is configured to include a plurality of unit cells 10 stacked along the stacking direction. More specifically, the stacked body 20 includes the plurality of unit cells 10, terminal plates (not shown) and ins...

second embodiment

B. Second Embodiment

[0029]FIG. 4 is a sectional view illustrating closeup of the configuration of a first end plate 30a in a fuel cell stack 100a according to a second embodiment. The fuel cell stack 100a of the second embodiment differs from the fuel cell stack 100 of the first embodiment by a first end plate 30a provided in place of the first end plate 30, a case 40a provided in place of the case 40, a placement groove 80a provided in place of the placement groove 80 and a resin layer 90a provided in place of the resin layer 90. The other configuration of the fuel cell stack 100a of the second embodiment is identical with that of the fuel cell stack 100 of the first embodiment. The like components are expressed by the like reference signs, and their detailed description is omitted.

[0030]The first end plate 30a of the second embodiment differs from the first end plate 30 of the first embodiment by omission of the placement groove 80. The case 40a of the second embodiment differs fr...

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Abstract

A fuel cell stack comprises a stacked body, an end plate and a case configured such that the stacked body is placed therein. The end plate is arranged to cover an end face of the stacked body in a stacking direction and an end face of the case in the stacking direction and is fastened to the end face of the case. A placement groove is formed in at least one surface out of two surfaces of the end plate and the case opposed to each other, such that a seal member is placed in the placement groove. The end plate includes a resin layer formed to continuously cover an inner circumferential wall surface of the fluid flow path hole, a surface of the end plate opposed to the stacked body, and an outer circumferential side end of the placement groove.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The present application claims priority from Japanese patent application 2016-145916 filed on Jul. 26, 2016, the entirety of the disclosure of which is hereby incorporated by reference in its entirety.BACKGROUND[0002]Field[0003]The present disclosure relates to a fuel cell stack.[0004]Related Art[0005]A plurality of manifolds are formed inside of a fuel cell stack configured such that a stacked body of a plurality of unit cells stacked in a stacking direction is placed between a pair of terminal plates and a pair of end plates provided on respective sides thereof, are arranged parallel to the stacking direction and are configured to supply reactive gases to the respective unit cells, discharge off gases from the respective unit cells, and supply and discharge a cooling medium to and from the respective unit cells. A plurality of through holes are formed in at least one of the end plates such as to communicate with the plurality of manifol...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): H01M8/2483H01M8/2485H01M8/04082H01M8/2475H01M8/241H01M8/1018
CPCH01M8/04201H01M8/2475H01M8/2485H01M8/2483H01M8/241H01M2008/1095H01M8/2465H01M8/249Y02E60/50
Inventor SHIMIZU, TATSUHIKOHAMADA, HITOSHITOKUMASU, TATSUYAOTA, TADANOBUNAKAMURA, YOSHIKI
Owner TOYOTA JIDOSHA KK